/Engine/Source/Runtime/Engine/Classes/Kismet/GameplayStatics.h
Spawns a decal at the given location and rotation, fire and forget. Does not replicate.
static [UDecalComponent](API\Runtime\Engine\Components\UDecalComponent) * SpawnDecalAtLocation ( const [UObject](API\Runtime\CoreUObject\UObject\UObject) * WorldContextObject, class [UMaterialInterface](API\Runtime\Engine\Materials\UMaterialInterface) * DecalMaterial, FVector DecalSize, FVector Location, FRotator Rotation, float LifeSpan )